Graphene and thin graphite films for ultrafast optical Kerr gating at 1 GHz repetition rate under focused illumination
Amr Farrag, Assegid M. Flatae, Mario Agio
https://arxiv.org/abs/2511.17713 https://arxiv.org/pdf/2511.17713 https://arxiv.org/html/2511.17713
arXiv:2511.17713v1 Announce Type: new
Abstract: The ability to address sub-picosecond events of weak optical signals is essential for progress in quantum science, nonlinear optics, and ultrafast spectroscopy. While up-conversion and optical Kerr gating (OKG) offer femtosecond resolution, they are generally limited to ensemble measurements, making ultrafast detection in nano-optics challenging. OKG, with its broadband response and high throughput without phase-matching, is especially promising when used at high repetition rates under focused illumination.
Here, we demonstrate an ultrafast detection scheme using the third-order nonlinearity of graphene and thin graphite films, operating at 1 GHz with sub-nanojoule pulses and achieving 141 fs temporal resolution. Their exceptionally large nonlinear refractive index, orders of magnitude higher than conventional Kerr media, enhances detection efficiency at smaller thicknesses, enables sub-picosecond response, and supports broadband operation. Their atomic-scale thickness minimizes dispersion and simplifies integration with microscopy platforms, optical fibers, and nanophotonic circuits, making them a compact, practical material platform for nano-optical and on-chip ultrafast Kerr gating.
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Evaluating LLM-Generated Legal Explanations for Regulatory Compliance in Social Media Influencer Marketing
Haoyang Gui, Thales Bertaglia, Taylor Annabell, Catalina Goanta, Tjomme Dooper, Gerasimos Spanakis
https://arxiv.org/abs/2510.08111
Crosslisted article(s) found for cs.HC. https://arxiv.org/list/cs.HC/new
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- CAG: Chunked Augmented Generation for Google Chrome's Built-in Gemini Nano
Vivek Vellaiyappan Surulimuthu, Aditya Karnam Gururaj Rao
Einstein and Debye temperatures, electron-phonon coupling constant and a probable mechanism for ambient-pressure room-temperature superconductivity in intercalated graphite
E. F. Talantsev
https://arxiv.org/abs/2511.07460 https://arxiv.org/pdf/2511.07460 https://arxiv.org/html/2511.07460
arXiv:2511.07460v1 Announce Type: new
Abstract: Recently, Ksenofontov et al (arXiv:2510.03256) observed ambient pressure room-temperature superconductivity in graphite intercalated with lithium-based alloys with transition temperature (according to magnetization measurements) $T_c=330$ $K$. Here, I analyzed the reported temperature dependent resistivity data $\rho(T)$ in these graphite-intercalated samples and found that $\rho(T)$ is well described by the model of two series resistors, where each resistor is described as either an Einstein conductor or a Bloch-Gr\"uneisen conductor. Deduced Einstein and Debye temperatures are $\Theta_{E,1} \approx 250$ $K$ and $\Theta_{E,2} \approx 1,600$ $K$, and $\Theta_{D,1} \approx 300$ $K$ and $\Theta_{D,2} \approx 2,200$ $K$, respectively. Following the McMillan formalism, from the deduced $\Theta_{E,2}$ and $\Theta_{D,2}$, the electron-phonon coupling constant $\lambda_{e-ph} = 2.2 - 2.6$ was obtained. This value of $\lambda_{e-ph}$ is approximately equal to the value of $\lambda_{e-ph}$ in highly compressed superconducting hydrides. Based on this, I can propose that the observed room-temperature superconductivity in intercalated graphite is localized in nanoscale Sr-Ca-Li metallic flakes/particles, which adopt the phonon spectrum from the surrounding bulk graphite matrix, and as a result, conventional electron-phonon superconductivity arises in these nano-flakes/particles at room temperature. Experimental data reported by Ksenofontov et al (arXiv:2510.03256) on trapped magnetic flux decay in intercalated graphite samples supports the proposition.
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Crosslisted article(s) found for cs.IR. https://arxiv.org/list/cs.IR/new
[1/1]:
- CAG: Chunked Augmented Generation for Google Chrome's Built-in Gemini Nano
Vivek Vellaiyappan Surulimuthu, Aditya Karnam Gururaj Rao
Thermal assisted transport of biexcitons in monolayer WSe2
Dorian B\'eret, Louka Hemmen, Vishwas Jindal, Sreyan Raha, Thierry Amand, Delphine Lagarde, Andrea Balocchi, C\'edric Robert, Helene Carrere, Xavier Marie, Pierre Renucci, Laurent Lombez
https://arxiv.org/abs/2510.03092
Crosslisted article(s) found for cs.CL. https://arxiv.org/list/cs.CL/new
[1/4]:
- CAG: Chunked Augmented Generation for Google Chrome's Built-in Gemini Nano
Vivek Vellaiyappan Surulimuthu, Aditya Karnam Gururaj Rao
Replaced article(s) found for cond-mat.mtrl-sci. https://arxiv.org/list/cond-mat.mtrl-sci/new
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- Thermal stability of nano-scale ferroelectric domains by molecular dynamics modeling
Arne J. Klomp, Ruben Khachaturyan, Theophilus Wallis, Anna Gr\"unebohm, Karste…
Charge dynamics of individual conductance channels within a percolation network of a nano-patterned nanocrystal quantum dot solid
Xiangxi Yin, Bence Papp, Shane Revel, Sk Tahmid Shahriar, Tamar S. Mentzel
https://arxiv.org/abs/2510.01162
Giant enhancement of terahertz high-harmonic generation by cavity engineering of Dirac semimetal
Siyu Duan, Lili Shi, Patrick Pilch, Anneke Reinold, Sergey Kovalev, Renato M. A. Dantas, Yunkun Yang, Faxian Xiu, Miriam Serena Vitiello, Zhe Wang
https://arxiv.org/abs/2510.01760
Anisotropic linear magnetoresistance in Dirac semimetal NiTe2 nanoflakes
Ding Bang Zhou, Kuang Hong Gao, Tie Lin, Yang Yang, Meng Fan Zhao, Zhi Yan Jia, Xiao Xia Hu, Qian Jin Guo, Zhi Qing Li
https://arxiv.org/abs/2510.00940
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